Spray dynamics and time-lag effects during high-pressure liquid oxygen impinging jets atomization without or with pressure oscillations
文献类型：期刊论文
| 作者 | Peng, Zhili2; Zhong, Bo1; Li, Longfei1; Yao W(姚卫)3; Chen, Xiaodong2 |
| 刊名 | PHYSICS OF FLUIDS
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 37期号:3页码:20 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0260187 |
| 通讯作者 | Chen, Xiaodong(xiaodong.chen@bit.edu.cn) |
| 英文摘要 | This study numerically investigates the spray dynamics and time-lag effects in high-pressure liquid oxygen (LOX) impinging jet atomization under three scenarios: varying pressure differences without oscillations, upstream pressure oscillations with different amplitudes, and downstream pressure oscillations. By coupling the Volume of Fluid method with the Lagrangian Particle Tracking model, the atomization process-encompassing liquid sheet breakup, fragment formation, and droplet generation-is analyzed through high-fidelity simulations. The results show that, in the absence of pressure oscillations, increasing the pressure difference influences jet velocity and droplet mass flow rate but has minimal effect on the Sauter Mean Diameter (SMD) within the considered range. Even without oscillations, the droplet mass flow rate exhibits large, nonperiodic fluctuations, reflecting the intrinsic instability of the atomization process, which may contribute to combustion instability. When external pressure oscillations are applied, either at the injector inlet or combustion chamber outlet, periodic variations are induced in both mass flow rate and SMD of the generated droplets. The amplitude of oscillation is positively correlated with the intensity of pressure fluctuations. Additionally, time-lag phenomena are observed: there is a negligible time lag between pressure oscillations and LOX mass flow rate fluctuations, while significant delays are seen between LOX mass flow rate and droplet mass flow rate oscillations. The time lag between LOX mass flow rate and SMD oscillations is comparatively shorter. These findings provide insights into transient spray behavior and temporal correlations in high-pressure impinging jet atomization, aiding the optimization of injector designs and improving combustion stability in rocket engines. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | COMBUSTION INSTABILITY ; SIMULATION ; MODEL ; FUEL |
| 资助项目 | National Natural Science Foundation of China10.13039/501100001809[U23B6009] ; National Natural Science Foundation of China10.13039/501100001809[12272050] ; National Natural Science Foundation of China |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001447606800011 |
| 资助机构 | National Natural Science Foundation of China10.13039/501100001809 ; National Natural Science Foundation of China |
| 其他责任者 | Chen, Xiaodong |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/100718]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Xian Aerosp Prop Inst, Xian 710199, Peoples R China; 2.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Zhili,Zhong, Bo,Li, Longfei,et al. Spray dynamics and time-lag effects during high-pressure liquid oxygen impinging jets atomization without or with pressure oscillations[J]. PHYSICS OF FLUIDS,2025,37(3):20. |
| APA | Peng, Zhili,Zhong, Bo,Li, Longfei,姚卫,&Chen, Xiaodong.(2025).Spray dynamics and time-lag effects during high-pressure liquid oxygen impinging jets atomization without or with pressure oscillations.PHYSICS OF FLUIDS,37(3),20. |
| MLA | Peng, Zhili,et al."Spray dynamics and time-lag effects during high-pressure liquid oxygen impinging jets atomization without or with pressure oscillations".PHYSICS OF FLUIDS 37.3(2025):20. |
入库方式： OAI收割
来源：力学研究所
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